Runtime Module pytransform

If you have realized that the obfuscated scripts are black box for end users, you can do more in your own Python scripts.In these cases, pytransform would be useful.

The pytransform module is distributed with obfuscated scripts, and must be imported before running any obfuscated scripts. It also can be used in your python scripts.


exception PytransformError

This is raised when any pytransform api failed. The argument to the exception is a string indicating the cause of the error.


Return how many days left for time limitation license.

>0: valid in these days

-1: never expired


If the obfuscated script has been expired, it will raise exception and quit directly. All the code in the obfuscated script will not run, so this function will never return 0.


Get license information of obfuscated scripts.

It returns a dict with keys:

  • expired: how many days left for this licenses, -1 means no time limitation
  • IFMAC: mac address bind to this license
  • HARDDISK: serial number of harddisk bind to this license
  • IPV4: ipv4 address bind to this license
  • DATA: any data stored in this licese, used by extending license type
  • CODE: registration code of this license

Raise PytransformError if license is invalid, for example, it has been expired.


Return a string, which is specified as generating the licenses for obfucated scripts.

Raise PytransformError if license is invalid.

get_hd_info(hdtype, size=256)

Get hardware information by hdtype, hdtype could one of

HT_HARDDISK return the serial number of first harddisk

HT_IFMAC return mac address of first network card

Raise PytransformError if something is wrong.


Constant for hdtype when calling get_hd_info()


Copy those example code to any script, for example, obfuscate it, then run the obfuscated script.

Show left days of license

from pytransform import PytransformError, get_license_info, get_expired_days
    code = get_license_info()['CODE']
    left_days = get_expired_days()
    if left_days == -1:
        print('This license for %s is never expired' % code)
        print('This license for %s will be expired in %d days' % (code, left_days))
except PytransformError as e:

More usage refer to Using Plugin to Extend License Type


Though is not obfuscated when running the obfuscated script, it’s also protected by PyArmor. If it’s changed, the obfuscated script will raise protection exception.

Refer to Special Handling of Entry Script